Nonslipping, cleanable tread



i .whereby said treads can be easily cleaned by brushing orwashing them inany one of sev-v` eral directions.l 1 1 1 Patented darn 9, i923,

n inist? estrias.

.'ULIUs BLUM, or .n.nnsnniz-oN-nunson, Nnw Yoeri.

NONSLPPNG, 1 CLEANABLE TRED.

' Application ined June 14,1919. seriai' No. ao/i,294.f

Be it known that I, JULiUs BLUM, a1citizen of the United States, residing at Ardsley-on-Hudson, in the State ot NewY'o-rlr, have jinvented certain new and useiul'lmprovements in` Nonslipping, i Cleanable tion.

.Treacls, yof which the following is a specifica#- f .My invention relates to non-,slippingsurfaces such as treads for stairs, walks, floorvi plates,`door saddles, platforms, 'conduitcov-y ers and thelilre and has for itsiobject to provide a non-slipping tread affording pro- Atection against shppingin one ot two waysl on any way across the tread, at thesame.

time `providing means whereby Vthe tread -will not collectL dirt, water,'ice or `oil and f may be easily cleaned.r`

i Another object of my invention'isto provide a non-slipping tread oit-.low weight per vsquare foot,'over which trucks or wheeled surfaces orbales caribe drawn or dragged in any direction with equal ease as tofdirec# tion and vwith` equal protection Aagainst' slippage, at' thesame time providinr ineans Another objectof my invention iste preservetlie non-slipping function oit the tread; i 1 providedwith ribs together with an easily cleanable `function whereby it may be cleaned yin several directions. rSuch plates would otherwise'collect dirt in their corners thereby makingthein'slippery and destroying or' modifying their noir-slipping` quali` yties l\lo matter where the dirt collects in` my tread nor where it settles 'the tread can readily be cleaned. 1 y n .Another object of theinventioiiis to profvidc 'a cleanable, non-slippingtread whose plates vmay be readilyujoiiied without dis-v i liguring the 'design and into which *erre-ws.A

" 1 can be readily located without having tol seek rspecial portions of the plate when screwing it down upon its support.

In accordance with-a particular einbodi" nient of my invention., lH provide a iionslip ping, cleanable tread consisting cita body plate with two sets of integral raised oblong Aribs ythe lengtli` of each rib being greater than its width, each rib heilig of si'iihcient length and height topi'event slipping,

the ribs of each .set running iii parallel rows and the ribs of oiie'set crossing tlie'rows of an: 'other yat an acute angle,lthe1ribs being sep" arated at-ftheii14 junctions, where otherwise corners wouldA torni', so as to permit cleaning. :Eachrow orn ribs comprisesa plurality Vof oblong, longitudinalribs extending along the rowkyl also make thejdistance between the ends otthefpair of ribs otone row greatery than the width of the rib of the inter- 1 secting row, thus providing-,additional'cleanand clog them. will inthe case of'mytr'ead 1 run oi in great measure and canV be removed by.` a' suitablecleanin'giinstrument such as a hose or broom.; f p

f lVith the above and other objects in'1view:

my invention consists inthe parts, vimprovements e and combinations more particularly" pointed out hereinafter. f

.Referring-now tufthe drawings, Fig l Visapla'n view ot the improvedtread.4 vFig 2 is a crosssectional view online fis-Ay of Fig.k 1. 1f Fig. t8. is a .perspective view showing the raised ribs somewhat exaggerated in height Fig. 4 is a detail-planviewot one 1 of the junction-points between `the-ribs- The improved tread. comprises a ,body

portion l carrying a seriesiof'raised'iibs, 2,

integral the'rewithv and projectingtherefrom. u Such plates are usuallyy made of steel. Aiplurality of sets of integral ribs are uti- "lized, ln the particular embodimentk of the invention illustrated, the body plate or por-A ofthe other set by numeral 3. vThe ribs of each set run in parallel rows and the ribs ot ione set cross vthose of the. otherset at yan anglef ln the particular embodiment of the invention illustrated the' ribs cross each.

other at 1an acute-angle, less thauninety'desv lgrees. Lozenged shaped spaces are thus formed 'between' the sides or" body portions of the ribs whichenclose the space.

In order to provide means for' self-clearing ,and for cleaning kthe treadthe ribs instead-'of meeting' each other at corners y are separated yat their `iunctions. It will thus be seen, as ,shown by the varrows A, B, that the tread can ,be readily cleanedr` in two di' rections. f The spaces between certa-in of the ribslie kalong the `dott`edlineliaving the di?.

"tionof the tread isprovided with'two sets l of' integral ribs. The ribs of one set ymay be designated by the numeral 2 and those 2 u iframe? rection of the arrow A, whereas the spaces between other ribs lie along the ydotted line having the direction oli the arrow at right angles to the former arrow.

'Ribs having sharp edges to preveirf: slipping are likely to collect dirt. inaddition .to separating of the junctions of the ribs so as to iform spaces arranged in rows at right angles to each other which will permit cleaning the plates byn brushingor scrubbing iii the directions indicated, lprovide additionalmeans enabling the plates to be readother directions.

ily cleaned by brushing or scrubbing in y At 4the junction olA the .ribs as illustrated in FiguiC and in Fig.l 1,

the distance betweenthe ends 'ot' eaclikpair of adjacent `ribs of the, saine row is greater than the width of the rib (lv oli' the f intersecting ribrow. 1n' tliisway the rib is spaced away from the line ot the edge of the rib 6 by a distance '7, Dirt, water orvoil which might collect at the bottoms of dicated .by-the numeral 7 a fraction of the the sides of tlie'ribwill tend to more' out and can be swept out readily by a bi'ooi'n or hose yproperly directed along the edge ot rib. In this way additional directions of f cleaning are provided indicated by the arrowsY C, D which correspond to the directicns'of the rows ofr'ibs.

In order not todim'inish'A the length and` extent of the 4non-slipping rib portions too much, at the saine time retaining the additional cleansing `function effected by spacing away one rib from the line of theedge ofr 'the intersecting rib, I' make this distance inwidtli Vof thelrib, thus keeping it olr small dimension. The spaces between ends of ribs are short and the ribs are correspondingly longer. The distance between the ends of each pair of adjacent ribs of the rows of one set lis made greater than the width of the ribs of the other set rby an amount equal to the width of va rib plus a fraction oli its width.

. In order to .provide .for an easy, smooth, sweeping action, Irinay slant the end of each rib at the junction as indicated by the numeral 8. In this-way the end of each rib is incl-ined at'the same angle as'tliat ofthe direction of the intersecting row oliv ribs. By sweep-ing in the rdirection of a row offribs the brooiii and dirt do not catchv at the inclined :end of :the intersecting rib. i

Having thus described .this invention, its `operation will beV clear. Dirt will not lodge or clog up the ribs, the tread can be easily cleaned and it attords safetyagainst slipping when walking across -o-r when o'bjects are `wheeled .or drawn across the tread in `any direction.

What I :cl-aim is: i 1 1. A. non-slipping, cleanable .tread `vcoin- -prising abady 'plate providedt with a plural-,ity off of ,raised-ribs, the ribs i Yof each set ruiming in parallel rows, each row comprising a plurality of oblong, longitudinal ribs, extending along the row, the length of each rib being greater than itsv width, one kset of ribs crossing another set at an acute angle, the ribs being separated their junctions so as vto permit cleaning. 2'. A non-slipping, cleanable tread coinprising a body plate provided with two sets j. of integral raised rbs, the ribs of each set running in parallel rows, each row comprisy' ing a plurality of oblong,longitudi`nal ribs, extending along the row, the length of each rib being greater than itswidth, andthe ribs of one set crossing those of the other set at an'angle, the ribs being separated atrtheir junctions so as to permit cleaning.

,j 3. A non-slipping, cleanable tread comprising a body plate provided withk two sets of integral raised ribs, the ribsrof-.eacli set running in parallel rows, each row comprising a plurality of oblong, longitudinal ribs,

extending along the row, the length of each rib. being greater than its width, and the ribs j of one set crossing those of the other set at an acute angle so as to form lozenged shaped spaces'between the bodies of the ribs, the

'ribs being separated at their junctions so as saine row being greater than thewidth of the rib of the intersecting rib row.

52A non-slipping, cleanable treadA comprising a body plate provided with two sets of integral raised ribs, the ribs of eachset,

i running in paralleliows, leach row'comprising a rplurality of oblong, longitudinal ribs,

extending along the row and the ribs of one set crossing'those of the other set at an acute angle,.the end of each rib being inclined to the body of `tlierib, the distance between the vrends ot each pa'irof `adjacent ribs of the rows ott one set being greater than the width of the ribs ot the other set by an amount equal to that ofv a rib plus a fraction of the width of the rib.

6. A non-slipping, cleaiiable tread coniprising a body plate provided with two sets jot integral oblong ribs, each rib being of s-uftlicient length and heightfto preyenat slip.- ping, the ribs of each set running parallel rows, each. row comprising a ,plurality of oblong, longitudinal ribs, extending along the row and the ribs of one set icrossing'tliose of the 4other .setat an acute angle, each irib ,of '.eahset being `Cut away at .the-junctions,

other set by an amount equal to a rib plus,

that of the 4fraction of the width of the rib, the end of each rib at a junction being inclined at the saine angle as that of the vdirection of the intersecting row of ribs. l Y 7; A non-slipping, cleanable tread, comprising a body plate provided with two sets of integral raised -ribs,.` the ribsof each set 't running in parallel rowsv and the ribs of one naine to this specification; t

set crossing those ot the otherset at an angle o'fless than 90 degrees, the said ribs having common crossing points, thus providing rows'of spaces, the rows of spaces extending at right'angles to each other and each row oispacesy being arranged 'at an angle of less `than 90 degrees withreference to the rows of ribs.

In testimony whereof, I have signed 'my JULIUs BLUM. 

